Updated Call For Adoption (CfA) Process

An updated Call for Adoption (CfA) process for the WEBRTC WG is available for inspection here:
https://github.com/w3c/webrtc-charter/blob/gh-pages/call-for-adoption-process.m


  *   This process is meant for proposals that are candidate for adoption by the WebRTC Working Group, developed in their own repo (which typically should NOT be a @w3c repo); the said proposals are expected to be marked as CG report or Unofficial Drafts until their formal WG adoption.

  *   When the Call for Adoption (CfA) starts, and until its review period ends (typically 7 days) , the repo main branch is frozen....